SE0302567D0 - Method and arrangement for oxygen delignification of cellulose pulp - Google Patents
Method and arrangement for oxygen delignification of cellulose pulpInfo
- Publication number
- SE0302567D0 SE0302567D0 SE0302567A SE0302567A SE0302567D0 SE 0302567 D0 SE0302567 D0 SE 0302567D0 SE 0302567 A SE0302567 A SE 0302567A SE 0302567 A SE0302567 A SE 0302567A SE 0302567 D0 SE0302567 D0 SE 0302567D0
- Authority
- SE
- Sweden
- Prior art keywords
- oxygen delignification
- arrangement
- cellulose pulp
- bleaching
- bleachability
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an optimal predetermined end-pH is obtained. This provides advantages in the subsequent bleaching since the bleachability is substantially improved in the form of reduced need for bleaching chemicals.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0302567A SE525773C2 (en) | 2003-09-24 | 2003-09-24 | Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase |
US10/939,616 US7156952B2 (en) | 2003-09-24 | 2004-09-13 | Method and arrangement for oxygen delignification of cellulose pulp |
FI20041208A FI20041208A (en) | 2003-09-24 | 2004-09-17 | Method and arrangement for oxygen delignification of cellulosic pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0302567A SE525773C2 (en) | 2003-09-24 | 2003-09-24 | Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0302567D0 true SE0302567D0 (en) | 2003-09-24 |
SE0302567L SE0302567L (en) | 2005-03-25 |
SE525773C2 SE525773C2 (en) | 2005-04-26 |
Family
ID=29246976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0302567A SE525773C2 (en) | 2003-09-24 | 2003-09-24 | Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase |
Country Status (3)
Country | Link |
---|---|
US (1) | US7156952B2 (en) |
FI (1) | FI20041208A (en) |
SE (1) | SE525773C2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE522593C2 (en) * | 1999-07-06 | 2004-02-24 | Kvaerner Pulping Tech | Oxygen gas delignification system and method of pulp of lignocellulosic material |
CN1886427B (en) | 2003-11-28 | 2012-05-23 | 伊士曼化工公司 | Cellulose interpolymers and method of oxidation |
NZ601075A (en) * | 2005-07-19 | 2014-01-31 | Inbicon As | Method and apparatus for conversion of cellulosic material to ethanol |
WO2008106083A2 (en) * | 2007-02-26 | 2008-09-04 | Andritz Inc. | Methods and systems for the use of recycled filtrate in bleaching pulp |
US20160002858A1 (en) * | 2014-07-03 | 2016-01-07 | Linde Aktiengesellschaft | Methods for the oxygen-based delignification of pulp |
US10954630B2 (en) | 2015-08-19 | 2021-03-23 | Godavari Biorefineries Ltd. | Process for producing cellulose with low impurities from sugarcane bagasse |
SE540043C2 (en) * | 2015-11-27 | 2018-03-06 | Valmet Oy | Method and system for oxygen delignification of cellulose pulp |
SE544255C2 (en) * | 2020-09-03 | 2022-03-15 | Valmet Oy | System for producing cellulose pulp and method for controlling such a system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE355614B (en) * | 1970-05-13 | 1973-04-30 | Mo Och Domsjoe Ab | |
US4198266A (en) * | 1977-10-12 | 1980-04-15 | Airco, Inc. | Oxygen delignification of wood pulp |
US4431480A (en) * | 1981-10-27 | 1984-02-14 | The Black Clawson Company | Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction |
US5460696A (en) * | 1993-08-12 | 1995-10-24 | The Boc Group, Inc. | Oxygen delignification method incorporating wood pulp mixing apparatus |
US6153300A (en) * | 1994-04-18 | 2000-11-28 | Ahlstrom Machinery, Inc. | Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals |
BR9611836A (en) * | 1995-12-07 | 1999-03-09 | Beloit Technologies Inc | Pulp oxygen delignification saves medium consistency |
SE514825C2 (en) | 1999-09-16 | 2001-04-30 | Aga Ab | Oxygen delignification of cellulose pulp with oxidized white liquor as an alkaline source |
-
2003
- 2003-09-24 SE SE0302567A patent/SE525773C2/en unknown
-
2004
- 2004-09-13 US US10/939,616 patent/US7156952B2/en not_active Expired - Fee Related
- 2004-09-17 FI FI20041208A patent/FI20041208A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI20041208A (en) | 2005-03-25 |
US20050061460A1 (en) | 2005-03-24 |
FI20041208A0 (en) | 2004-09-17 |
SE0302567L (en) | 2005-03-25 |
SE525773C2 (en) | 2005-04-26 |
US7156952B2 (en) | 2007-01-02 |
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